Heater.



PATENTED MAR. 17, 1908.

G. H. BARTLBTT.

HEATER. APPLIoATIoN FILED APB. 4, 1907.

IIIIIII WITNESSES.'

UNITED S'IA'IllSA PATEN FFIE.

GEORGE H. BARTLETT, or SAN FaANCIsCo, CALIFORNIA.

To all whom it may concern:

Be it known that I, GEORGE H. BARTLETT, citizen of United States,residing at the city and 4county of San Francisco and State ofCalifornia, have invented new and useful Improvements i-n Heaters, ofwhich the follow- 1n is a specification.

y invention relates to a heating apparatus.

' It consists inthe combination of arts, and

in details of-construction which wi l be more tion ta en through fullyexplained by reference to the accompanying drawings, in which- Figurelis a sectional viewof the complete a paratus. Fi 2 is a transverse sec-It is the obj ect of my invention to provide an a paratusfor the`convenient and rapid heatm 'of fluids.

As s own in the drawing, A is a vertically supported tubeof'ponsiderable length having a standard or support 2 within which thelower end is supported. Into the lower part of this support a gas-burner3 is carried, and

vthe burner tip opens vertically and centrally upwardP at the bottom ofthe tube A. The support 2 is formed with elastic tongues, the

ends of the tongues extending u ward andi' clasping the lower 'end ofthe tu e A, and these to es unite below `the tube to form a single ular,supportthrough which the burner, plpe is inserted, and within which itma be held'. The-space below the ,tongues of t e ,part 2 admit airwhich, passing around the burner furnish suicient oxygen for combustionof the-gas, and the heat passing up throughthe tube is received into anexterior .case 'or jacket 4 which is supported from the i -upper end ofthe tube A so as to leave a suffi- 40 cient space forthe escape of theproducts of combustion into the upper art of the casing 4; this-casingbeing close `at the top an( open'at thenbettorn,` the heat is' divertedfrom the'upperend of the pipe 4 and carried .downwardasshown by thearrows. This ortion ofthe device is sufficient for the heat- If itisdesired to heat liquids the tube A is inclosed by a jacket 5 which isclosed at the bottom, and at the upper end this jacket is connected'bytubes 6 With a repeptacle 7 'whichis exterior to the casing 4.

Specification of Letters Patent. Application mea April s, 1907'.- serialN5. 366,294.

Patented March l?, 1908.

Thus this casing 4 is inclosed by the outer receptacle 7, and in turn itincloses the inner receptacle or casing 5. From the bottom of thereceptacle 7, pipes 8 extend downwardly rece tacle 5.

T e operation of the device will then be as follows: The gas being lihted, heat will pass upwardly through the tu e A, and the latter willbecome intensely hot, and the heat from it will be imparted to andcarried through the surrounding casing 4 and discharged at the lower endthereof, which will be sufhcient to heat a large body` of air. When thiscasin is located between the water-chambers 5 an 7. the heat from itwill be rapidly imparted to the liquid within these chambers throu l1the thin metal walls of the casing 4. The i uid heated within theelongated casing 5 wi be rapidly carried up through the passages 6 intothe up er part of the chamber or receptacle 7, and the naturalcirculation caused thereby will carry the li uid down around the outsideof the heate casing 4, thence through the pipes 8, and into the lowerpart of the inner chamber 5. This ra id circulation will cause theliquid to be E very short time, and it may be supplied and drawn off atany suitable points by connectin ip es.

aving thus described my invention, what I claim and desire to secure byLetters Patent is- I l In a heating` ap aratus of the characterdescribed, a v ferjticalpo en-ended tube, a burner centrally loc Ated beow the tube, and means for supplyin air thereto, a casing with a closedtopand open bottom surrounding the upper part of the tube, and supportedto allow heat to ass from the tube into the casing and be disc argeddownwardly, a 1i uid containing chamber located between tie inner tubeand the casing, and extending to substantiall the lower end of the innertube, a second cliamber concentric with the tube and first-named chamberand of greater diameter -than the latter, said second chamber containina liquid and having its lower end connecte to a corresponding portion ofsaid cas ing, tubes connecting the upper end of the in and return `waterfrom the bottom of the receptacle 7 into the lower part of the tubulareated in a ner chamber with the exterior chamber, and my hand inpresence of two subscribing Witreturn plpes ((:ionneeting theowr end olftge nesses. exterior 1qu contqirung c am er Wit e nter1or11qu1d contammgchamber at a pomt GEORGE H' BARTLETT' 5 which is below the plane of theopen bottom Witnesses:

of' the casing. S'. H. NoURsE,

In testimony whereof I have hereuto set FREDERICK E. MAYNARD.

